EXHIBIT 99.3  Secured Convertible Note - Longview Fund, LP

THIS  NOTE AND THE COMMON SHARES ISSUABLE UPON CONVERSION OF THIS NOTE HAVE NOT
BEEN REGISTERED  UNDER  THE  SECURITIES ACT OF 1933, AS AMENDED.  THIS NOTE AND
THE COMMON SHARES ISSUABLE UPON  CONVERSION  OF  THIS  NOTE  MAY  NOT  BE SOLD,
OFFERED  FOR  SALE,  PLEDGED  OR  HYPOTHECATED  IN  THE ABSENCE OF AN EFFECTIVE
REGISTRATION STATEMENT AS TO THIS NOTE UNDER SAID ACT  OR AN OPINION OF COUNSEL
REASONABLY SATISFACTORY TO SOUTH TEXAS OIL COMPANY THAT  SUCH  REGISTRATION  IS
NOT REQUIRED.

SECURED CONVERTIBLE NOTE

       FOR  VALUE  RECEIVED,  SOUTH  TEXAS  OIL  COMPANY,  a Nevada corporation
(hereinafter called "Borrower"), hereby promises to pay to LONGVIEW  FUND,  LP,
600 Montgomery Street, 44th Floor, San Francisco, CA 94111, Fax: (415) 981-5300
(the  "Holder")  or  order,  without  demand, the sum of $960,870 Dollars, with
simple interest accruing on July 28, 2007  (the  "Maturity Date"), or sooner as
described herein.

       This Note has been entered into pursuant to  the terms of a subscription
agreement between the Borrower and the Holder, dated of even date herewith (the
"Subscription  Agreement"),  and  shall  be  governed  by  the  terms  of  such
Subscription  Agreement.   Unless  otherwise  separately  defined  herein,  all
capitalized terms used in this Note shall have the same meaning as is set forth
in the Subscription Agreement.  The following terms shall apply to this Note:

                                   ARTICLE I

                              GENERAL PROVISIONS

       1.1   Interest Rate.   Subject to Section 5.7 hereof,  interest  payable
on  this  Note shall accrue at a rate per annum (the "Interest Rate") equal  to
the "prime  rate"  published in The Wall Street Journal from time to time, plus
four percent (4%).   The  interest  rate shall be increased or decreased as the
case may be for each increase or decrease  in the prime rate in an amount equal
to such increase or decrease in the prime rate;  each change to be effective as
of the day of the change in such rate.  The Interest  Rate  shall  not  be less
than eight percent (8%).

       1.2   Conversion  Privileges.   The  Conversion Privileges set forth  in
Article  II shall remain in full force and effect  immediately  from  the  date
hereof and  until  the  Note is paid in full regardless of the occurrence of an
Event of Default.  The Note  shall  be  payable  in  full on the Maturity Date,
unless  previously converted into Common Stock in accordance  with  Article  II
hereof; provided,  that  if  an Event of Default has occurred, the Borrower may
not pay this Note, without the  consent  of  the  Holder,  until up to one year
after  the later of the date the Event of Default has been cured  or  one  year
after the Maturity Date.

       1.3   Default  Interest  Rate.    A  default  interest  rate  of fifteen
percent  (15%)  per  annum shall apply to amounts owed hereunder which are  not
paid on their respective due dates.  Interest payable on this Note shall accrue
from the date of this  Note  and  be  payable  upon each Conversion, January 1,
2006,  semi-annually  thereafter,  and  on the Maturity  Date,  accelerated  or
otherwise, when the principal and remaining  accrued  but unpaid interest shall
be due and payable, or sooner as described below.

                                  ARTICLE II

                               CONVERSION RIGHTS

       The Holder shall have the right to convert the principal  due under this
Note  into  Shares  of  the Borrower's Common Stock, $.001 par value per  share
("Common Stock") as set forth below.

       2.1.  Conversion into the Borrower's Common Stock.

       (a)   The Holder shall  have  the  right  from and after the date of the
issuance of this Note and then at any time until this  Note  is  fully paid, to
convert any outstanding and unpaid principal portion of this Note,  and accrued
interest,  at the election of the Holder (the date of giving of such notice  of
conversion being  a "Conversion Date") into fully paid and nonassessable shares
of Common Stock as  such  stock exists on the date of issuance of this Note, or
any shares of capital stock  of  Borrower  into  which  such Common Stock shall
hereafter  be changed or reclassified, at the conversion price  as  defined  in
Section 2.1(b)  hereof (the "Conversion Price"), determined as provided herein.
Upon delivery to  the  Borrower  of a completed Notice of Conversion, a form of
which is annexed hereto, Borrower  shall issue and deliver to the Holder within
three (3) business days from the Conversion  Date  (such  third  day  being the
"Delivery Date") that number of shares of Common Stock for the portion  of  the
Note  converted  in  accordance  with  the  foregoing.   At the election of the
Holder, the Borrower will deliver accrued but unpaid interest  on  the  Note in
the manner provided in Section 1.3 through the Conversion Date directly to  the
Holder  on  or  before  the  Delivery  Date  (as  defined  in  the Subscription
Agreement).   The  number  of  shares  of  Common Stock to be issued upon  each
conversion of this Note shall be determined  by  dividing  that  portion of the
principal of the Note and interest to be converted, by the Conversion Price.

       (b)   The  Borrower  shall  issue for each $1,000 of Note principal  and
interest for which a Notice of Conversion  is  given, an amount of Common Stock
equal to 0.000195652 of the Common Stock of the  Company outstanding on a fully
diluted basis as of the last day preceding the relevant  Conversion  Date.  For
the  purposes  of  the  aforedescribed calculation, "fully diluted basis" shall
include all of the Shares  of  Common  Stock issuable upon conversion of all of
the Notes issuable to the Subscription Agreement  as  if  all  such  Notes were
fully  converted  on  the Initial Closing Date but shall not thereafter include
shares of Common Stock issued upon actual conversion of such Notes and exercise
of the Warrants; issuable  pursuant  to the Subscription Agreement. As employed
in this Note, "fully diluted basis" means  all  of the outstanding Common Stock
together  with  all  Common Stock that may be issued  upon  the  conversion  or
exercise of all outstanding  options,  warrants,  convertible  instruments  and
similar  agreements as of a determination date, including Common Stock added to
treasury after Initial Closing Date.
       (c)     The  Conversion  Price  and  number  and kind of shares or other
securities to be issued upon conversion determined pursuant  to Section 2.1(a),
shall be subject to adjustment from time to time upon the happening  of certain
events while this conversion right remains outstanding, as follows:

       A.    Merger,  Sale  of Assets, etc.  If the Borrower at any time  shall
consolidate with or merge into  or  sell or convey all or substantially all its
assets to any other corporation, this  Note, as to the unpaid principal portion
thereof and accrued interest thereon, shall  thereafter  be  deemed to evidence
the  right to purchase such number and kind of shares or other  securities  and
property  as  would  have  been  issuable  or  distributable on account of such
consolidation,  merger,  sale  or  conveyance, upon  or  with  respect  to  the
securities subject to the conversion  or  purchase  right  immediately prior to
such consolidation, merger, sale or conveyance.  The foregoing  provision shall
similarly  apply  to  successive transactions of a similar nature by  any  such
successor or purchaser.   Without limiting the generality of the foregoing, the
anti-dilution provisions of this Section shall apply to such securities of such
successor  or  purchaser  after   any   such  consolidation,  merger,  sale  or
conveyance.

       B.    Reclassification, etc.  If the  Borrower  at  any  time  shall, by
reclassification  or  otherwise,  change  the  Common Stock into the same or  a
different number of securities of any class or classes  that  may  be issued or
outstanding, this Note, as to the unpaid principal portion thereof and  accrued
interest  thereon, shall thereafter be deemed to evidence the right to purchase
an adjusted number of such securities and kind of securities as would have been
issuable as  the  result  of  such  change  with  respect  to  the Common Stock
immediately prior to such reclassification or other change.

       C.    Stock Splits, Combinations and Dividends.  If the shares of Common
Stock are subdivided or combined into a greater or smaller number  of shares of
Common Stock, or if a dividend is paid on the Common Stock in shares  of Common
Stock,  the  Conversion  Price  shall  be  proportionately  reduced  in case of
subdivision  of  shares  or stock dividend or proportionately increased in  the
case of combination of shares,  in  each such case by the ratio which the total
number of shares of Common Stock outstanding immediately after such event bears
to the total number of shares of Common  Stock outstanding immediately prior to
such event.

       D.    Share Issuance.   So long as  this  Note  is  outstanding,  if the
Borrower  shall  issue  or agree to issue any shares of Common Stock except for
the  Excepted Issuances (as  defined  in  the  Subscription  Agreement)  for  a
consideration  less  than  the  Conversion  Price in effect at the time of such
issue, then, and thereafter successively upon  each  such issue, the Conversion
Price shall be reduced to such other lower issue price.   For  purposes of this
adjustment,  the  issuance  of any security carrying the right to convert  such
security into shares of Common  Stock  or  of  any  warrant, right or option to
purchase  Common Stock shall result in an adjustment to  the  Conversion  Price
upon the issuance  of  the above-described security and again upon the issuance
of shares of Common Stock  upon  exercise of such conversion or purchase rights
if such issuance is at a price lower  than  the  then  applicable  Maximum Base
Price.  The reduction of the Conversion Price described in this paragraph is in
addition  to  other  rights  of  the  Holder  described  in  this  Note and the
Subscription Agreement.

       (d)   Whenever  the  Conversion  Price  is  adjusted pursuant to Section
2.1(c) above, the Borrower shall promptly mail to the  Holder  a notice setting
forth the Conversion Price after such adjustment and setting forth  a statement
of the facts requiring such adjustment.

       (e)   During  the  period  the  conversion  right exists, Borrower  will
reserve from its authorized and unissued Common Stock not less than 175% of the
number  of  shares of Common Stock issuable upon the full  conversion  of  this
Note.  Borrower  represents  that  upon  issuance, such shares will be duly and
validly  issued,  fully  paid and non-assessable.   Borrower  agrees  that  its
issuance of this Note shall  constitute full authority to its officers, agents,
and transfer agents who are charged  with  the  duty  of  executing and issuing
stock certificates to execute and issue the necessary certificates  for  shares
of Common Stock upon the conversion of this Note.

       2.2   Method of Conversion.  This Note may be converted by the Holder in
whole  or  in  part  as described in Section 2.1(a) hereof and the Subscription
Agreement.  Upon partial  conversion  of  this  Note, a new Note containing the
same date and provisions of this Note shall, at the  request  of the Holder, be
issued by the Borrower to the Holder for the principal balance of this Note and
interest which shall not have been converted or paid.

       2.3   Maximum Conversion.  The Holder shall not be entitled  to  convert
on a Conversion Date that amount of the Note in connection with that number  of
shares of Common Stock which would be in excess of the sum of (i) the number of
shares of Common Stock beneficially owned by the Holder and its affiliates on a
Conversion  Date,  (ii)  any  Common  Stock  issuable  in  connection  with the
unconverted portion of the Note, and (iii) the number of shares of Common Stock
issuable   upon   the  conversion  of  the  Note  with  respect  to  which  the
determination of this provision is being made on a Conversion Date, which would
result in beneficial  ownership  by  the Holder and its affiliates of more than
4.99%  of  the outstanding shares of Common  Stock  of  the  Borrower  on  such
Conversion Date.   For  the  purposes  of  the  provision  to  the  immediately
preceding sentence, beneficial ownership shall be determined in accordance with
Section  13(d)  of  the  Securities  Exchange  Act  of  1934,  as  amended, and
Regulation 13d-3 thereunder.  Subject to the foregoing, the Holder shall not be
limited to aggregate conversions of only 4.99% and aggregate conversion  by the
Holder may exceed 4.99%.  The Holder shall have the authority and obligation to
determine whether the restriction contained in this Section 2.3 will limit  any
conversion  hereunder  and  to  the  extent that the Holder determines that the
limitation  contained  in  this Section applies,  the  determination  of  which
portion of the Notes are convertible shall be the responsibility and obligation
of the Holder.  The Holder may  waive  the  conversion  limitation described in
this Section 2.3, in whole or in part, upon and effective  after  61 days prior
written  notice  to  the  Borrower.  The Holder may allocate decide whether  to
convert a Note or exercise  Warrants  to  achieve  an  actual  4.99%  ownership
position.

       2.4.  Optional  Redemption  of  Principal Amount.  Provided an Event  of
Default has not occurred, whether or not  such Event of Default has been cured,
the Borrower will have the option of prepaying the outstanding Principal Amount
("Optional Redemption"), in whole or in part,  by paying to the Holder a sum of
money equal to one hundred and twenty percent (120%) of the Principal Amount to
be redeemed, together with accrued but unpaid interest  thereon and any and all
other sums due, accrued or payable to the Holder arising under this Note or any
Transaction Document through the Redemption Payment Date  as defined below (the
"Redemption Amount").  Borrower's election to exercise its right to prepay must
be  by  notice in writing ("Notice of Redemption").  The Notice  of  Redemption
shall specify  the  date  for such Optional Redemption (the "Redemption Payment
Date"), which date shall be  thirty  (30)  business  days after the date of the
Notice of Redemption (the "Redemption Period"). A Notice  of  Redemption  shall
not  be effective with respect to any portion of the Principal Amount for which
the Holder  has  a  pending election to convert pursuant to Section 2.1, or for
conversions initiated  or made by the Holder pursuant to Section 2.1 during the
Redemption Period.   On  the  Redemption  Payment  Date, the Redemption Amount,
less  any  portion  of  the  Redemption  Amount against which  the  Holder  has
exercised its rights pursuant to Section 2.1,  shall  be  paid in good funds to
the Holder. In the event the Borrower fails to pay the Redemption Amount on the
Redemption Payment Date as set forth herein, then (i) such Notice of Redemption
will  be  null  and void, (ii) Borrower will have no right to  deliver  another
Notice of Redemption,  and  (iii) Borrower's failure may be deemed by Holder to
be a non-curable Event of Default.

                                  ARTICLE III

                               EVENT OF DEFAULT

       The occurrence of any  of  the  following  events  of default ("Event of
Default") shall, at the option of the Holder hereof, make all sums of principal
and  interest  then  remaining  unpaid  hereon  and  all other amounts  payable
hereunder  immediately  due and payable, upon demand, without  presentment,  or
grace period, all of which  hereby  are  expressly  waived, except as set forth
below:

       3.1   Failure to Pay Principal or Interest.  The  Borrower  fails to pay
any  installment  of principal, interest or other sum due under this Note  when
due and such failure continues for a period of ten (10) business days after the
due date.

       3.2   Breach  of  Covenant.  The Borrower breaches any material covenant
or other term or condition  of  the  Subscription Agreement or this Note in any
material respect and such breach, if subject to cure, continues for a period of
ten (10) business days after written notice to the Borrower from the Holder.

       3.3   Breach   of  Representations   and   Warranties.    Any   material
representation or warranty  of  the  Borrower  made herein, in the Subscription
Agreement,  or  in  any agreement, statement or certificate  given  in  writing
pursuant hereto or in  connection therewith shall be false or misleading in any
material respect as of the date made and the Closing Date.

       3.4   Receiver or  Trustee.   The  Borrower shall make an assignment for
the  benefit of creditors, or apply for or consent  to  the  appointment  of  a
receiver  or  trustee  for  it  or  for  a  substantial part of its property or
business; or such a receiver or trustee shall  otherwise  be  appointed without
the  consent  of  the  Borrower  is  not  dismissed within sixty (60)  days  of
appointment.

       3.5   Judgments.  Any money judgment,  writ  or  similar  final  process
shall  be  entered  or  filed  against Borrower or any of its property or other
assets for more than $75,000, and  shall remain unvacated, unbonded or unstayed
for a period of forty-five (45) days.

       3.6   Bankruptcy.  Bankruptcy, insolvency, reorganization or liquidation
proceedings or other proceedings or relief under any bankruptcy law or any law,
or the issuance of any notice in relation  to  such  event,  for  the relief of
debtors  shall  be  instituted  by  or  against  the Borrower and if instituted
against Borrower are not dismissed within forty-five (45) days of initiation.

       3.7   Delisting.    Delisting of the Common  Stock  from  any  Principal
Market; failure to comply with  the  requirements  for  continued  listing on a
Principal Market for a period of five consecutive trading days; or notification
from  any  Principal  Market  that  the Borrower is not in compliance with  the
conditions for such continued listing on such Principal Market.

       3.8   Non-Payment.   A default  by  the  Borrower  under any one or more
obligations in an aggregate monetary amount in excess of $75,000  for more than
twenty days after the due date, unless the Borrower is contesting the  validity
of such obligation in good faith.

       3.9   Stop  Trade.   An  SEC  or  judicial stop trade order or Principal
Market trading suspension that lasts for five or more consecutive trading days.

       3.10  Failure to Deliver Common Stock  or  Replacement Note.  Borrower's
failure to timely deliver Common Stock to the Holder  pursuant  to  and  in the
form required by this Note and Sections 7 and 11 of the Subscription Agreement,
or, if required, a replacement Note.

       3.11  Non-Registration  Event.   The  occurrence  of  a Non-Registration
Event as described in Section 11.4 of the Subscription Agreement.

       3.12  Reservation  Default.   Failure by the Borrower to  have  reserved
for issuance upon conversion  of  the  Note  the  amount of Common stock as set
forth in this Note and the Subscription Agreement.

       3.13  Cross  Default.  A default by the Borrower  of  a  material  term,
covenant, warranty or  undertaking of any other agreement to which the Borrower
and Holder are parties,  or the occurrence of a material event of default under
any such other agreement which  is  not  cured after any required notice and/or
cure period.

                                  ARTICLE IV

                               SECURITY INTEREST

       4.    Security Interest/Waiver of Automatic Stay.   This Note is secured
by a security interest granted to the Collateral  Agent  for the benefit of the
Holder  pursuant to a Security Agreement, as delivered by Borrower  to  Holder.
The Borrower  acknowledges  and  agrees  that  should  a  proceeding  under any
bankruptcy or insolvency law be commenced by or against the Borrower, or if any
of  the  Collateral  (as  defined in the Security Agreement) should become  the
subject of any bankruptcy or  insolvency  proceeding, then the Holder should be
entitled to, among other relief to which the  Holder  may be entitled under the
Transaction Documents and any other agreement to which  the Borrower and Holder
are parties (collectively, "Loan Documents") and/or applicable  law,  an  order
from the court granting immediate relief from the automatic stay pursuant to 11
U.S.C.  Section  362  to  permit  the  Holder to exercise all of its rights and
remedies pursuant to the Loan Documents  and/or  applicable  law.  THE BORROWER
EXPRESSLY WAIVES THE BENEFIT OF THE AUTOMATIC STAY IMPOSED BY 11 U.S.C. SECTION
362.  FURTHERMORE, THE BORROWER EXPRESSLY ACKNOWLEDGES AND AGREES THAT  NEITHER
11  U.S.C.  SECTION  362  NOR ANY OTHER SECTION OF THE BANKRUPTCY CODE OR OTHER
STATUTE OR RULE (INCLUDING,  WITHOUT  LIMITATION,  11 U.S.C. SECTION 105) SHALL
STAY, INTERDICT, CONDITION, REDUCE OR INHIBIT IN ANY  WAY  THE  ABILITY  OF THE
HOLDER  TO  ENFORCE  ANY  OF  ITS  RIGHTS AND REMEDIES UNDER THE LOAN DOCUMENTS
AND/OR APPLICABLE LAW.  The Borrower  hereby  consents to any motion for relief
from  stay  that  may be filed by the Holder in any  bankruptcy  or  insolvency
proceeding initiated  by  or  against  the Borrower and, further, agrees not to
file any opposition to any motion for relief  from  stay  filed  by the Holder.
The  Borrower  represents,  acknowledges  and agrees that this provision  is  a
specific and material aspect of the Loan Documents,  and  that the Holder would
not agree to the terms of the Loan Documents if this waiver  were not a part of
this Note. The Borrower further represents, acknowledges and agrees  that  this
waiver  is  knowingly,  intelligently  and  voluntarily  made, that neither the
Holder   nor  any  person  acting  on  behalf  of  the  Holder  has  made   any
representations  to  induce this waiver, that the Borrower has been represented
(or has had the opportunity  to he represented) in the signing of this Note and
the Loan Documents and in the  making  of  this  waiver  by  independent  legal
counsel  selected  by  the  Borrower  and  that the Borrower has discussed this
waiver with counsel.

                                   ARTICLE V

                                 MISCELLANEOUS

       5.1   Failure or Indulgence Not Waiver.  No failure or delay on the part
of Holder hereof in the exercise of any power,  right  or  privilege  hereunder
shall operate as a waiver thereof, nor shall any single or partial exercise  of
any  such  power, right or privilege preclude other or further exercise thereof
or of any other  right,  power  or privilege.  All rights and remedies existing
hereunder are cumulative to, and  not  exclusive  of,  any  rights  or remedies
otherwise available.

       5.2   Notices.  All notices, demands, requests, consents, approvals, and
other  communications required or permitted hereunder shall be in writing  and,
unless otherwise  specified  herein,  shall  be  (i)  personally  served,  (ii)
deposited  in  the  mail,  registered  or  certified, return receipt requested,
postage prepaid, (iii) delivered by reputable  air courier service with charges
prepaid,  or  (iv)  transmitted  by  hand  delivery,  telegram,  or  facsimile,
addressed as set forth below or to such other address as  such party shall have
specified  most recently by written notice.  Any notice or other  communication
required or  permitted to be given hereunder shall be deemed effective (a) upon
hand delivery or delivery by facsimile, with accurate confirmation generated by
the transmitting  facsimile  machine, at the address or number designated below
(if delivered on a business day  during normal business hours where such notice
is  to be received), or the first business  day  following  such  delivery  (if
delivered  other than on a business day during normal business hours where such
notice is to  be received) or (b) on the second business day following the date
of  mailing by express  courier  service,  fully  prepaid,  addressed  to  such
address,  or  upon actual receipt of such mailing, whichever shall first occur.
The addresses for  such  communications  shall  be:  (i) if to the Borrower to:
South Texas Oil Company, 6330 McLeod Drive, Suite 1, Las Vegas, NV 89120, Attn:
Murray  Conradie,  President  and  CEO,  telecopier: (210)  568-9761,  with  an
additional copy by telecopier only to: Owen  M.  Naccarato,  Esq.,  Naccarato &
Associates,  18301  Von  Karman  Ave., Suite 430, Irvine, CA 92612, telecopier:
(949) 851-9262, and (ii) if to the  Holder,  to  the name, address and telecopy
number set forth on the front page of this Note, with a copy by telecopier only
to Grushko & Mittman, P.C., 551 Fifth Avenue, Suite  1601,  New  York, New York
10176, telecopier number: (212) 697-3575.

       5.3   Amendment  Provision.  The term "Note" and all reference  thereto,
as used throughout this instrument,  shall  mean  this instrument as originally
executed,  or  if  later  amended  or  supplemented,  then  as  so  amended  or
supplemented.

       5.4   Assignability.  The obligations of Borrower  under  this  Note are
not  assignable  without the consent of the Holder.  This Note shall be binding
upon the Borrower  and  its  successors  and  assigns,  and  shall inure to the
benefit of the Holder and its successors and assigns.

       5.5   Cost  of  Collection.  If default is made in the payment  of  this
Note, Borrower shall pay  the  Holder  hereof  reasonable  costs of collection,
including reasonable attorneys' fees.

       5.6   Governing Law.  This Note shall be governed by  and  construed  in
accordance  with  the  laws  of  the  State of New York.  Any action brought by
either party against the other concerning the transactions contemplated by this
Agreement shall be brought only in the  civil or state courts of New York or in
the federal courts located in the State and  county  of New York.  Both parties
and the individual signing this Agreement on behalf of  the  Borrower  agree to
submit  to  the  jurisdiction  of  such  courts.  The prevailing party shall be
entitled to recover from the other party its  reasonable  attorney's  fees  and
costs.

       5.7   Maximum  Payments.   Nothing  contained  herein shall be deemed to
establish  or require the payment of a rate of interest  or  other  charges  in
excess of the  maximum permitted by applicable law.  In the event that the rate
of interest required  to  be paid or other charges hereunder exceed the maximum
permitted by such law, any payments in excess of such maximum shall be credited
against amounts owed by the  Borrower  to  the  Holder and thus refunded to the
Borrower.

       5.8   Shareholder  Status.   The  Holder shall  not  have  rights  as  a
shareholder of the Borrower with respect to  unconverted portions of this Note.
However, the Holder will have all the rights of  a  shareholder of the Borrower
with  respect  to  the shares of Common Stock to be received  by  Holder  after
delivery by the Holder of a Conversion Notice to the Borrower.

       IN WITNESS WHEREOF,  Borrower  has  caused this Note to be signed in its
name by an authorized officer as of the 28 day of July, 2005.

SOUTH TEXAS OIL COMPANY


By: /s/ Murray Conradie
Name: Murray Conradie
Title: President

WITNESS:


By: /s/ Jason Griffith
Name: Jason Griffith
Title: CFO



                             NOTICE OF CONVERSION

(To be executed by the Registered Holder in order to convert the Note)


The  undersigned  hereby  elects to convert $_________  of  the  principal  and
$_________ of the interest due on the Note issued by South Texas Oil Company on
July ___, 2005 into Shares  of  Common  Stock  of  South Texas Oil Company (the
"Borrower") according to the conditions set forth in  such Note, as of the date
written below.



Date of Conversion:____________________________________________


Conversion Price:______________________________________________


Shares To Be Delivered:________________________________________


Signature:_____________________________________________________


Print Name:____________________________________________________


Address:_______________________________________________________

       _________________________________________________________